In addition of the call and two-way audio function ideal for their automatic vehicle dispatch, TOPFLYTECH TT8503 has a Panic button key that sending SOS messages to predefined phone numbers. Also, TT8503 device of TOPFLYTECH can send multiple type of SMS alerts to predefined mobile phones numbers and guaranteed the person safety that used the locator in your service routes or deliveries tasks. The best way to hours of service control in real-time of the TOPFLYTECH TT8503 GPS tracker is registered then whiten a Tracking Management Platform always online with field service management control. Using TT8503 in our GPS tracking platform that has European regulations of tachograph, you can control their event management and manage some scheduled reports or also use our REST API to connect existing applications. In our GPS platform, you can also control their driver´s care driving and manage the control of driving habits of their driver´s without requirement limit or you can control their vehicle preventative maintenance that help you to reduce company cost, in addition you can use without extra cost our automatic data sending service to external servers. With our GPS platform you can use our mobile applications for control their TT8503 tracker from a mobile phone and you can manage the fuel consumption control if use TT8503 for mobile asset tracking or also control their mobile asset efficient driving without requirement limit.